Generally, why Bicycle tires are thinner and Motorcycle tires thick? I know, not all bicycles have thin tires nowadays, but generally why bicycles have much thinner tires than the motorcycles?
With the exception of fatbikes, the widest bike tyres are narrower than the narrowest motorbike tyres.  I'll ignore fatbikes as somewhere between too specialised and a novelty.

You'll also notice that all motorbikes have significant amounts of suspension.  Fat tyres and suspension both absorb energy from vertical motion.  This can be a good thing, for example if you ride over a pothole, or a bad thing, if the vertical motion is from pedalling hard.  Motorbikes aren't propelled by pedalling so don't have to worry about this.  They also go much faster so the consequences of hitting a pothole are more severe, or would be without something to absorb the hit.

Motorbike tyres are likely to have higher rolling resistance. With the rims to support them they also have much higher weight and rotational inertia, meaning bigger brakes -- but you need those anyway given the speed.  The rolling resistance is significant in terms of human power output, but given that even a 125cc motorbike can put out 11kW continuously and a pro cyclist more like 500W it's not significant in motorbike power terms.  This higher power (and higher braking force) has to be coupled to the road somehow, and that's through the contact patch.  Typical bike tyres wouldn't last long until even modest motorbike acceleration, or give enough grip for hard acceleration/braking.

In summary: motorbikes can have bigger tyres because they've got more power, and they need to because they're faster and more powerful.