Oh my G!
Catheters are the worst! OK second worst - right below dilation and cystoscopy....
They are extremely painful, uncomfortable and highly degrading and not even that reliable.
If you so much as move an inch, sneeze or even walk, you will know and feel it right in your dick.
And with external catheters you also have to worry about blowout and it is as much hassle to deal with as diapers are. Plus that ivory soap and crap leaves your penis feeling like it's raw all day.
Even worse- waking up with a catheter and dealing with the wood... or erections.... owwww painful memories. Several times my cath or bag sprung a leak and it was 10x worse to cleanup or deal with
Really you don't save any dignity using catheters instead of diapers.
At least I can still get an erection when I see a hot girl

and I don't have to worry even half as much about leaks or have my dick hurt if I sneeze or cough. And he'll I can actually exercise some in diapers compared to when I had to use a catheter.
The advertisements showing how you can exercise freely using such catheters (internal or external like the "liberty" cath) are clearly bs
Regardless the so called "environment cost", the relative cost in comfort, pain and dignity for me is a far more scarce resource that I am not going to part with so easily for such a flimsy "solution"