Get some clarification about bias stabilisation with Emitter Degeneration
If \$I_E\$ increases, \$V_{R_E}\$ must increase.
\$V_{\ bias}\$ is fixed, so KVL means \$V_{BE}\$ decreases, which decreases \$I_B\$, which decreases \$I_C\$ and \$I_E\$, stabilizing the Q-Point.
The Q-Point changes, but the addition of \$R_E\$ causes greater stability.
From Input characteristic curve of common collector configuration.