I can't personally say exactly why Trello doesn't support rich links like that currently. My thinking is it's likely due to the challenge of displaying that in a way that wouldn't disrupt the structure or format of a card's description or comments.
Regardless, I'll be happy to pass your interest in this along to our product team for consideration in the meantime.
If you had to thrive a new habit during a lockdown, what would it be? Trello
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