Depends on your speakers and your amplifier.
In my case it was worth the effort in a previous system.
I had floorstanders with dual 6-3/4 inch woofers that had their own set of speaker termminals. They had another set of terminals for the 4-1/2 inch midrange and 1 inch tweeter. The internal crossover managed the signal between midrange and tweeter.
With my 80 watt integrated amplifier driving the entire speaker using the supplied brass jumpers, the system ran out of power sooner than I liked- sounded strained, harsh and slightly clipping in the midrange and bass punch reached its peak.
I then used the pre-outs of the integrated to connect to a 150 WPC power amp of the same brand, same gain, and connected it to the woofer terminals.
I connected the speaker terminals of the 80 watt integrated amp to the midrange+tweeter terminals.
Wow what a change. Bass punch and response was incredibly powerful and beyond my needs, never ran out of gas. The midrange never ever sounded strained or clipped, could crank that system as high as I could ever want.
So in that case the original amp was underpowered for the entire speaker at the volume level I preferred. Also since the speakers had a midrange / tweeter setup and had separate jumpers for the woofers, driving them with a separate amp was worthwhile.
I would never find biamping worth the effort with an amplifier just for a tweeter- they consume such a small amount of power. I would also not consider biamping a speaker without dual sets of jumpers and having to bypass the internal crossovers. Opens up a can of worms not worth the effort.