Putting all your eggs into one basket is a bad approach for pretty much anything, particularly when that basket is one that has its own monetary interests as it

Putting all your eggs into one basket is a bad approach for pretty much anything, particularly when that basket is one that has its own monetary interests as its main motivator. You want valid alternatives to keep the products offered competitive, and the competitors honest, as entrenched monopolies are rarely conductive to innovation and often extremely opposed to consumer interests.