By setting defaults, its the reason why Microsoft was accused for being anti conpetitive by having a default browser installed https://en.m.wikipedia.org/wiki/United_States_v._Microsoft_Corp
And why Windows N version exists
https://en.m.wikipedia.org/wiki/Windows_10_editions (look under N/KN in regional variations)
Its why google also for european devices offer a default search engine selection as setting a default is considered anti competiive in EU
https://www.reuters.com/article/eu-google-antitrust-idUSL4N24Y2GY