I am just suggesting that any brand new brewer might be able to happily start with all grain if they desire. There isn't much difference between that and extract, one is not necessarily easier than the other, there are just different steps involved in each. I get sick of the idea of all grain requiring more experience or expertise vs extract because they both produce excellent beers and it's really a matter of how many hours out of your day do you want to spend brewing?! But I suggest that anyone who is able to extract brew is also entirely capable of all grain brewing if they are willing to spend the extra time that the process demands.
Everyone is capable of brewing all grain but I'll argue against the statement that all grain does not require more expertise. Of course there will be people that jump into hobbies, or any task for that matter, with intensity of commitment, research, etc. Sure. If we're talking about the average new brewer, no way. I think about it a lot because as a homebrew shop owner, initial success for my customers is both a personal and business goal. It's very easy to understand this when you list out all the things you have to learn and execute for both methods. My main is that you'll find all grain brewing has a significant additional task load on top of the things you have to learn for ONLY extract brewing. Breaking the learning up into two sessions is beneficial because it increases odds of first brew success.
Extract:
Water: just use bottled distilled. Some for the boil, the rest at 35F for fast cooling during topoff. No need for mineral additions.
Steeping Grains: Almost any water volume, wide temperature range, wide time range. You can only affect the beer negatively by overheating past 170F.
Boil: Concentrated boil reasonable. Understanding hopping schedules
Chilling: Ice bath the boiled wort, top off with frozen or highly chilled top bottled water.
Sanitizing cold side parts
Pitch yeast at appropriate temps.
Ferment
Sanitize bottles and associated bottling and racking gear
Rack and bottle without oxidation being sure to adequately stir priming sugar.
Cap bottles.
OK. That's quite a lot to get your head around right there. My beginner classes cover all of that and it takes at least 2 hours to explain it.
All Grain (I'll focus on BIAB because it does have a simplified PROCESS in the grand scheme of all possible all grain brewing methods)
Water: Safe bet, use distilled and add salts. More complicate, get a water report and learn to compensate in a number of ways using spreadsheets. If you ignore water and make decent beer, it's either luck or a palette that cannot discern the difference.
Mashing: Compared to extract, heating a lot more water in a bigger pot. Can the stove handle it? If not, propane burner. Hold relatively narrow temperature ranges. Required acidification of pale beer mashes to keep pH in check.
Wort separation, BIAB pulleys, strainers, etc.
Full boils practical (just about required). Larger volume to transfer to fermenter, larger volume to chill without the benefit of cold top up water. Wort chiller is the practical solution.
When I teach an all grain class, the beginner class is a prerequisite and I highly recommend attending after one or two extract batches. This class alone is at least 1.5 hours of lecture content in addition to performing the process real time.
Summary, all grain is not a realistic first homebrew process for MOST people (because we've already seen success anecdotes from the margins). If you find all difficulty a fun challenge then you already know you're an outlier.