This assumes you have more valuable ideas than you can implement. Which, at first glance, seems like something you can take for granted. But in my career over 15 years I was surprised to find it's not the case for most established businesses. The existing business acts as a constraint that limits the idea space way down, and the ability for owners and product managers to generate ideas is way lower than I ever expected.

Execution of unrelated ideas seems like a natural follow on, and having managed several such "labs" efforts, it's actually a good idea but it inevitably grinds up against the lack of will to continue investing in the face of headwinds, especially since the main business line is several orders of magnitude larger than anything labs can deliver in a foreseeable timeframe.