What you have found is quite normal. Its a turbo assist to help people buying presumably their first pump driven espresso machine and who dont know how to froth milk, to froth milk, without having any technique or expertise to rely on. Stick it in the milk, and make.....froth / soap suds.
In so far as modifying so the operator can develop their own technique and get a better quality of texture in the milk foam, you need only purchase the previous version "panarello" (thats what they are called...literally means "frother" or "frothie"). Slip the outer (turbo) tube off this panarello. This leaves a long inner pipe to use as a simple steam pipe (unlike the panarello assembly that comes with the machine that only has a short unusable inner stub).
Unscrew the pinch nut on the current panarello & slip it off the metal steam pipe, and replace it with the new one (ie the one you buy), screw up the pinch nut and whalla, problem solved. Use it without ever slipping the outer turbo tube back on.
Should have one of these in stock, and if you want to investigate just email firstname.lastname@example.org and ask for spare parts and service section.