Companies hollow out (or enshittify) their products because it is easy and because it guarantees results at least in the short term. There are other ways to grow, and they tend to require imagination and long-term planning. Don't blame the stock market for entirely voluntary choices of taking the easy way out.
[1]: https://arstechnica.com/gadgets/2014/03/at-apple-shareholder...
Sure, but VCs and big companies want to maximize profit, not just be profitable. When a profitable startup sells out, that's the founders also saying "profitable isn't enough for me".
Or just "I'm done with this shit". It's remarkably difficult to run a small (software) business in the US. Section 174, multi-state income tax filings. It's a bloody pain if your goal is not just to operate the business and be overhead, but to actually do stuff. Regulatory/tax complexity thresholds depending on business size would be a welcome improvement.
So yes, it have to work, at least for their reputation, but it also have to not work that much.
A casino with no physical upkeep ?
And if it succeeds in getting people to match, they definitely stop using it.
"Likely to stop using it" is the better outcome for them in terms of customer retention