Why does the Hebrews author speak of two events and a Canaanite prostitute who lied as exemplars of faith?

Why does he now shift from specific people and circumstances to more generalized exhortation?

The New and Living Way | Episode 37 | Hebrews 11:29-32

By faith they passed through the Red Sea as by dry land: which the Egyptians assaying to do were swallowed up.

By faith the walls of Jericho fell down, after they had been compassed about for seven days.

By faith Rahab the harlot perished not with them that were disobedient, having received the spies with peace.

And what shall I more say? for the time will fail me if I tell of Gideon, Barak, Samson, Jephthah; of David and Samuel and the prophets.