Why? Because they not only pick something that helps them, they also pick the legacy that comes intrinsically with it.
If they want this legacy not to be a burden, they need to take appropriate steps: contribute to it, through the means of their choice: developer time, advocate time, money, structure, anything.
It's (a bit) like all industries sourcing from the environment (trees, vegetables, minerals, oil, gaz, etc.): it's all available for free, let's pick it.
Only, if you're not careful about the sustainability of it, and the consequences of sourcing these, it will backfire at you at some point. Badly.
If they want this legacy not to be a burden, they need to take appropriate steps: contribute to it, through the means of their choice: developer time, advocate time, money, structure, anything.
It's (a bit) like all industries sourcing from the environment (trees, vegetables, minerals, oil, gaz, etc.): it's all available for free, let's pick it. Only, if you're not careful about the sustainability of it, and the consequences of sourcing these, it will backfire at you at some point. Badly.