If doing things the right way the first time is being anal then the description fits me like a glove.
If you doubt my credentials, then you have not looked hard enough.
Water feature basins DO have access doors, some more than one (Obviously you have not taken any time to research this).
If you want to cobble something together that may not have the structural or functional integrity that it could have, that is your business and the customer's future headaches. It is apparent that you posted the original question on this forum with a closed mind. Sorry that you don't like the answers you got.
Stick to Landscaping and mowing grass.
"Everybody is ignorant, only on different subjects." - Will Rogers