Thats partially that we insist on interpreting it in this contorted lens of “how the founding fathers meant it”, when words like “reasonable” seem like they’re clearly meant to reflect the current opinion of the populace. If people find it unreasonable, it is, and vice versa.

I don’t think “interstate commerce” is unclear at all. That’s one where started with an end goal in mind and rationalized everything in between. There is no sane English reading of that passage that resembles the current interpretation at all. We just repeatedly mentally Google Translated it to Spanish and back until it was vague enough to allow what we wanted.