Experimenting with Whonix Gateway and Parrot OS: Easy attack on Whonix?

Today i am experimenting with installation of Whonix Gateway and Parrot OS, hence i found the way to join both machines together work properly but still i am confused why Parrot OS can see through “netdiscover” 2 hosts:

I can see actual Whonix Gateway host with 10.152.152.10 but why Parrot identifies 10.0.2.15 with same MAC address and uncovers potential for an attacker to exploit It? For example, i am hacker, i search with netdiscover LAN, and instead of hacking Gateway, i go for easy target 10.0.2.15 which is an internal adapter on Whonix gateway which connects directly to host OS, is it a feature or real risk to be attacked?

I thought communication between Parrot OS or Whonix Workstation must go strictly only on 10.152.152.10, isnt it?

Perhaps i am noob and see things wrong, please help to explain