First, the specific part…
That’s flawed reasoning based on limited information.
Blocking all Tor exit relays is neither hard nor uncommon. Trivial to block Tor when using cloudflare (literally just a setting in the webinterface) just to name 1 method. And many do so. All of this is being elaborated with more details here: Tor Browser Essentials chapter Tor Censorship in Whonix wiki.
Finally, the general part…
Generally, without using Whonix: No, not directly. Only when an exploit is available and being used.
Example, here:
Whonix ™ Track Record against Real Cyber Attacks chapter Tor Browser Bundle (2012, 2013, 2017) in Whonix wiki
Yes. Recommended reading this page:
Whonix ™ - Overview chapter Innovative Architecture in Whonix wiki
See also this: