why I should not buy ig followers??

i am new to this and for few months now i manually follow/unfollow/like/comment at least 200 persons a day and today I have somewhere around 400 followers ..but honestly this is TENACIOUS I spend around 8 hours at work and 8 hours home non-stop follow+like+unfollow+comment+create / post new content+check some courses about marketing + check forums and so on and so forth every day…

honestly, I can't anymore I am exhausted

everyone recommends not to use FL or buy followers… why, what's…

why I should not buy ig followers??