If you type the phrase "why do you need a helmet" in the search, the first few lines will display information about incidents that make it clear that you still need it.

Of course, according to many desperate riders, a helmet can't help with a heavy hit. Yes, that's often true, but there are also many situations where having a helmet on your head really did save the driver's or passenger's life.

It doesn't matter how fast you want to go, on what road or in what condition, injuries can happen in any condition.

types of helmets
Helms vary widely, and each gear class has preferred types.

Integral (full face)
integral
integral

The most versatile, reliable and simple option, suitable for most motorcycle classes.

With this closed helmet you can offer maximum protection as it completely covers the head. The protective glass is equipped with a folding mechanism. Its main feature is a reliable chin guard, which is damaged in 35% of accidents. The seat belt serves to keep the helmet on the head in the event of an accident. This type of protection is ideal for lovers of fast driving.

The main advantages include:

excellent protection;
excellent aerodynamic performance;
excellent sound insulation;
Protection from the bright sun, dust, wind and adverse weather conditions;
the ability to choose a design that suits a particular image.

Defects:

poor ventilation, in traffic jams you just want to throw your chin back;
the need to move away to drink and eat;
uncomfortable to use with rear sight and sunglasses.

Modular (expandable)

This type is an upgraded integral that is more practical and versatile. The helmet completely covers the head. The inner padding is the same as the predecessor, but there is one major difference, namely: weight, sun visor and a special design of the chin piece that is movable thanks to the swivel joint. Such a chin bar in a helmet greatly facilitates the life of a motorcyclist - he can drink water, smoke or talk to others without removing the helmet. A special button is responsible for the opening function, which is protected against accidental pressing. This model is the most popular among truckers.

The main advantages of the module are:

excellent aerodynamics;
high degree of protection;
convenience and comfort of use;
good sound insulation (compared to open helmets);
the ability to fold up the protective glass and chin;
the ability to connect an intercom or headset.
easy to use with glasses
The disadvantages are:

higher cost;
insufficient ventilation;
the heaviest weight among helmets;
lower aerodynamics than integral;
noise (depending on quality);
Fragility (due to a more complex device)

I am sure that motorcycle helmet review will be useful to you if you are interested in this field.