Okay, so we play micro stakes, 6max. I have seen quite some good players advocating not to raise small ofsuit aces, like A7o- from the CO or even BTN.
Take for example sauce's guide, but others have said has well.
(and some have said DO raise them)

Can someone give me some reasons for not raising them?

I know there's some reverse implied odds in them, but that can't be enough to not play them IP with initiative against bad players.

Fwiw, I'm still in the mindset that I like them, because I often get to see all 3 streets when IP and having initiative (preflop raise get's called, cbet get's called, turn checks through), so;
- I'm hitting my A pretty often.
- A high sometimes is good enough at showdown
- Implied odds from 2 pair, top trips, often 1 street TP value
- preflop folds and flop folds

edit: 6max