Don't get caught up on the term "pressing" its obviously just a machine that replicates some degree of knocking in.
Someone more knowledgeable can correct me but both "pressing" and "knocking in" are trying to do the same thing- put a protective crust on spongy bouncy willow to lengthen the life of the material. Doesn't really matter how you get there.
Don't take my advice, but bats seem fairly robust albeit for a short overall lifetime nowadays...
Buy bat from a shop you trust to look after you so long as you don't take the p1ss
Have shop knock it in
Get impatient to use it and have an hour or two on the bowling machine
Probably get even more impatient and hit some proper balls earlier than you *should*
Use bat until it dies
Repair for a second life if it was dear to you and like close family
Buy something else if not and enjoy a new bat