Remove “left click” from shortcut keys for changing brush size, hardness, flow and opacity

I would like to see the “left click” removed from changing brush wth mouse/trackpad or being able to choose shortcut keys.

Just having Ctrl + Opt or Shift + Ctrl + Opt would make it much easier. O

Shortcut keys for brush today

Size

•Ctrl + Opt + left-click and drag horizontally (left/right) on Mac

Hardness

•Ctrl + Opt + left-click and then drag vertically (up/down) on Mac

Opacity

•Shift + Ctrl + Opt + left-click and drag horizontally (left/right) on Mac

Flow