"need" is a stupid term for this purpose
you don't "need" a camera for hobby photography
but full frame is objectively better since you can use aps-c lenses on full frame too so you have more options
>>4441308 (OP) >Do I need full frame or APSC for hobby photography?
True answer: get one of each.
I have a Sony a7ii (full frame) and a Pentax K10D (APS-C). Get one kind or the other to begin with and then get the other kind down the road.