guest0001
In my experience (it is already the case with gmail and outlook up and now), this means I will not be able to login to my account when in holiday in another city, country, or when I use a borrowed device, or when I am behind VPN/Tor, etc, unless I give google my phone number, and can afford to get a call / sms at that point of time and unblock the account.
It should be my choice, as it is my account that is at risk, to turn on/off such dubious security measures. It is fine to have these features on by default, but I would like to turn this particular feature off for my account. Any clever "risk assessment" thing where a computer decides without an option to turn if off/on is problematic.
I have sometimes the feeling they know this and it is on purpose. They want not only to collect data, they want to collect high quality data and these measures help to clean their data sets at time of collection.