any condensation or extremely congested areas? those are 2 good reasons, but don't do it whimsically.
not only do leaves capture light but they take in co2. they are the lungs. they are the productionfacilities for sugars that power all growth. Leaves are incredibly important and removing leaves absolutely does not allow the plant to "focus on the buds" -- that's one of those 'bro-science' comments that sound realistic and scientific but are absolute nonsense - not an opinion or debate.
read "to defoliate or not" on cocoforcannabis com. in factread all their grow guides and articles in dr photon's corner. it is solid info with limited marketing nonsense mucking up the information. they do try to sell shit, so when talking about a product they hawk, be more skeptical, lol, as is always the case.
some more bro-science nonsense -- not transplanting autoflowers. absolutely not a concern unless you purpsefully destroy the rootball while doing it. That's some myth that gets repeated over and over again until the masses believe it but never actually learned anything about it.