Google might not MITM you, but a shitty wifi router, your ISP, a hotspot, a hacked device on your network, or the government, and more can and will MITM you.

Time and time again you see stories of people having tracking, ads, and malware injected into their browsing from free wifi, most ISPs, cell providers, hacked wifi routers, or even antivirus software.

Enabling HTTPS is THE baseline, there's no excuse not to have it.