Security professional here. This is legit a good call on their part. It’s because those types of addresses won’t bounce emails but aren’t necessarily in your control; it’s very, very easy to spam those petition forms with mail@ for a million real domains without bouncing the emails, making them seem legit.
You own your domain, obviously, so it’s really as simple as creating a forwarding/alias address of “[email protected]”. If creating a forwarding/alias address is that much of a problem for you I suggest that you likely shouldn’t be hosting your own email in the first place.
Your laziness isn’t a good reason to be upset with a company taking steps to reduce their security overhead significantly