Yes totally agree, my point was of all the sensors on the engine, the only ones that could be affected by a change in fuel would be the lambdas, e.g., if the mechanic diagnosed a TPS or cam sensor you know he is talking BS about the e10. It's highly unlikely but shouldn't be dismissed without some investigation and facts, not hearsay or Facebook speculation. It's not said what car it is but at 23000 miles must be fairly modern and compatible with e10.
On a certain M3 forum I'm on ,the amount of people that insist on running them on super unleaded only when the handbook clearly states it can run on 95 as it has adaptive knock control. BMW say you can run then safely on E10 but the reaction on some on the forum is like they are being asked to run it on diesel. During the recent fuel shortage some were panicking because there was no 98 anywhere and were scared to put e10 in case it immediately damaged the engine.