I have spectrum and they don’t forcibly route anything for me.
You must have either their modem maybe? Or you have the DNS helper setting where if you mistype a url it redirects you.
Either way there is a way to disable it because it doesn’t happen for me and hasn’t in the many years I’ve had them across the country.
That’s still a combo device which I generally would avoid. But basically anything that isn’t provided by the cable company will be better.