You might not like the definition, but that doesn't mean it's wrong.
Even if we accept your assertion that it's the best way to value something, that doesn't mean it's the only way to value something.
It comes from The Market. It comes from some other entity saying, "This is worth X to us, and we're willing to pay that. Here's an offer."
THAT is value. I've already said this, but I'll say it again:
Revenue !== value.
Value is what someone is willing to pay (for the company). It is set by the market. Revenue may or may not be used by the suitor to determine value, that is, how much they're willing to pay to acquire the generated value.
Revenue !== Value
To clarify, they are all business in the legal sense. But a "solopreneur" who gets hits by a bus, leaves customers high and dry, and can't exit (i.e., have someone else carry on) is not to compared to an entrepreneur who generates value such that an exit is possible, and customers are less likely to get screwed.
Notice the modifier. That indicates it is not the only (and to many people, not even the most important) type of value.
At the extreme, imagine all these social media "creators". In some cases, tons of revenue. But their revenue-producing-hobby is such that no one could take the torch and carry on. If that person is abducted by aliens, the company also disappears. No one else can buy it and carry on. That is, no value created.
I'll keep repeating this:
Revenue !== value
Entrepreneurs create value. Not revenue. Value.
The problem with this thread seems to be that people are confusing revenue with value. If it was about revenue, then the definition would say that. It specifically says value.
Or again, the "influencer" model. TONS of revenue but when was the last time you heard of such a person selling? They're not because there's no value. The influences walks away, the house of cards collapses. No one is going to pay for that. So, sorry, no value - regardless of revenue.
Therefore, if you ever want to know the value of your business as a reflection of the alleged value it creates, put it up for sale (or sell shares). You will quickly find out if you're actually creating value or not, or at least someone thinks you have the potential to create value. But that isn't revenue.
That's it. You want to measure value? Then be prepared to ask the market (i.e., exit) Anything else is a proxy, a deception, or something you tell yourself to make yourself feel good.