Earlier bitcoin mining was considered as easy and very profitable and that is the main reason many miners were joined to the network but now things has got little complicated because electricity in many countries are not cheap and even mining hardware is too expensive so most miners think bitcoin mining power waste at least should be reduced in coming years so miners can take a profit than a lost and it will do good to the network
Without a doubt and i agree with you that many miners are leaving bitcoin mining because the low income and higher waste of electricity but which also led to environmental damage but we should understand that we are living in a time that most of the things are becoming possible at least for some extend through technology and its advancements so why cant we use that to reduce the environmental damage which cause by bitcoin and making bitcoin mining more profitable using sustainable mining methods which should be very possible specially today