Think of a lake as a three dimensional body of water instead of just surface area. Bass will position themselves according to seasonal patterns horizontally, and vertically. Sometimes their shallow and buried in the weeds, downed wood, and docks. Sometimes they move off shore and chase baitfish gathering in baitballs. During prolonged hot weather they will also hang at the Thermocline depth, enjoying the comfortable temps, good O2 levels, as well as baitfish hanging at this level. Sometimes they move to the first deep drop-off and position against the drop-off walls. Sometimes they move deeper and position around any structure they can find deep. As long as the O2 levels are good deep, they will be quite happy deep hugging structure. In lakes, you can't just beat the banks for fish all year long, knowing how deep they are is a key factor in catching fish.
There are lures that will maximize your chances at each of these depths. You could write a book on what to use at each depth. You need to do research on line to figure that out for yourself. Good luck my friend, the more time on the water the better you will get at catching bass, all year long.