Indeed.
As much as they try to mystify it and insist it's not "cloning", it's still just a process in which a complete set of a person's DNA is used to reproduce their body and then modified to a desired state of age, appearance and fitness, which in any other instance in the Marvel Universe would simply be called cloning.
Infact it could be reasoned that an absence of the X-gene would make things easier, since the body creators wouldn't need to be carefull about accidently triggering the powers in the husk.
True. They were designed to apprehend mutants and be resistant to their powers, which includes not being affected by telepathy either because of being remote controlled robots.
However this resistance/immunity only extends to themself and they are an extremely brute force approach to dealing with any mutant power in general, not the danger of telepathy in particular, which isn't an ability exclusive to mutants.
Using the classic MKII based Sentinels as a way of dealing with telepaths as a source of espionage or manipulation is akin to dealing with hackers by driving a squad of M1 Abrams to their house and firing at it until there is nothing but rubble left, colleteral damage or even hitting the person in question not being a concern.
To put it jokingly, nobody would bring a Mark II Sentinel to a board meeting just to be sure the other side's entourage doesn't include a telepath.
The most notable exceptions where the Primes, who could extend a suppression field around them after scanning a mutant powers, but with the exception of Karima, it seems writers like to ignore their existence and have not brought them back in a notable capacity, while constantly going back to the cumbersome big stupid ones.
Even then however they are still specialized towards mutants and also not an option for mutant groups.
So overall, they aren't really the Marvel Universe answer to telepaths what ECM is to electronic warfare.