Why do many jobs have an age limit of 35? Is this a form of discrimination?

When we are looking for a job, we can see that many enterprises require "age limit below 35" when recruiting, and some even put forward "post-90 s". In my opinion, this is a kind of employment discrimination.

Many employers are still keen to reap the "youth bonus". This situation has led to "35+", "40-year-old, 50-year-old" people becoming "people with employment difficulties", facing difficulties such as unemployment and falling family income.

Now the country will implement "delayed retirement". If the retirement age is delayed to 65, then 35 years old should be the golden stage of life and work. But the reality is that we have had an extremely difficult time since we were 35 years old! It's not that I don't want to go to work, but "35 years old" is like a high wall that we can't cross. Once, we were all young, and now there are old people and young people. We are eager to work and afraid of unemployment, but the employees who are often laid off are all 35+.

The recruitment age is limited to 35 years old, which has become a common phenomenon in social recruitment enterprises. It is believed that 35 years old is no longer a human resource, but a human cost. Their energy and physical strength are not as good as those of young people. Because of physical problems, they can't always stay up late to work overtime. They are old and young, their parents need to take time off when they are unwell, and their children need to take time off when they are unwell; In addition, the cost of hiring them may be higher. Because of this reality and various factors, many enterprises have set the hard condition of recruitment at 35 years old.

However, are 35-year-olds really useless?

They are capable, experienced and experienced. They are burdened with great pressure in life, and they will have more reliable stability than their jobs, and they will know how to pay and return. If the enterprise limits the recruitment age to 35, and it is one-sided and across the board, then what is not discrimination?

Delayed retirement is coming, so what should these people do between 35 and 65?