I disagree. These days smartphones can do almost everything that one can do on computer.
Really, if you were right young people would be as strong as their elders with computers. Unfortunately in occidental countries that's not what it is happening, there is what is called a "computer illiteracy" and many young people are not even able to accomplish basic office tasks involving computers. It could be the main reason why cryptocurrencies are not easily adopted by the new generations unfortunately btw.
People around me at least underrestimate mobiles, and they just think some things are impossible and consider mobile as call making and entertainment device. Every time I feel the need of pc, I search on play store if there there is app available for my need and more often than not it's avaialble.
Now, I don't argue that desktops are more convenient than mobiles but most can be done on mobiles these days.
Also, I am not using the Android device of my phone directly, I am using verified apps or wallets from Google Play Store
I must warn you, do not blindly believe that 'verified by play protect' are all safe apps.