Seaplane Rating Add-On and Seaplane Rental

Well,....it seems to me that it doesn't make a sense doing a ASES
Rating, besides the fun of flying a seaplane for a few hours.
The main reason for me is to be able to fly a seaplane alone and not
under supervision.
It would be much more cheaper to fly 1 or 2 hours as a pax in a
seaplane from the right seat than train for a rating which can't be
used after it to rent a plane for my own.
It would be the same to me getting a driver licence, but not being
able to drive by my own, always having a supervisor on the right seat.

Your statements help me much to decide not to do a seaplane rating
(ASES)

Thank you all

Peter