A lot of folks seem to overlook the fact that the half life on these meds runs about 6 days. So even if you're pinning every single day, what you inject per shot is only one piece of the puzzle. From my own testing — I used to dose every 3 days and have moved to every 4 days — what really catches up with you is how much has built up in your body at any given moment.
Take a daily dose of .25mg. That adds up to just 1.75mg across a week. Sounds small, sure, but that figure only reflects what goes in, not what's lingering inside you. With a half-life near 6 days, yesterday's shot is mostly still around when today's goes in, and the day before that is largely still there as well. So each tiny daily pin keeps piling on top of the last.
At .25 mg per day, a few weeks in you'd be sitting at about 2.25 mg in your system almost constantly. Nobody's claiming you're injecting 2 mg a day, but by the same token your body isn't only seeing .25 mg at a time either.
That's what I think people miss about daily microdosing. The peaks and valleys would be gentler, but you'd also essentially never hit much of a low point. I'd question whether holding the drug that steadily elevated might actually produce more persistent side effects for certain people, instead of fewer by default just because each individual shot is small.