No, it won't. It will be clearer and better tasting if you properly ferment, condition, and use good sanitation. Whether you secondary or not.
I think others on here, beyond me have had different experiences that that...we would say quite the opposite.
Leaving a beer in primary for a month IS conditioning, btw.....
Clarity is clarity regardless of whether a beer is "proeprly germented" or not.......And my beers have been MUCH more clearer than when I ever used secondaries....I have the judging comments to back it up.
This is my yeastcake for my Sri Lankin Stout that sat in primary for 5 weeks. Notice how tight the yeast cake is? None of that got racked over to my bottling bucket. And the beer is extremely clear.
That little bit of beer to the right is all of the 5 gallons that DIDN'T get vaccumed off the surface of the tight trub. When I put 5 gallons in my fermenter, I tend to get 5 gallons into bottles. The cake itself is like cement, it's about an inch thick and very, very dense, you can't just tilt your bucket and have it fall out. I had to use water pressure to get it to come out.
Ths is the last little bit of the same beer in the bottling bucket, this is the only sediment that made it though and that was done on purpose, when I rack I always make sure to rub the autosiphon across the bottom of the primary to make sure there's plenty of yeast in suspension to carb the beer, but my bottles are all crystal clear and have little sediment in them.
Half the time I forget to use moss, and you can't tell the difference in clarity.
I'm not going to argue this with you, I've probably been long primarying on here longer than anyone...I would be doing it if I thought I t did lend something positive to my beers, despite what YOU may believe......