Of the many explanations for Jack Dorsey's resignation as head of Twitter, one is particularly credible.

You have to familiarize yourself with the mundane possibility that he just didn't feel like it anymore.

Dorsey himself portrays the resignation as a heroic act with the aim of making Twitter independent of its founders.

That may sound logical at first.

Many companies thrive when entrepreneurs step back and let managers take charge.

Only, it is difficult to derive a general rule from this, see Tesla and Elon Musk.

Experience is more that some entrepreneurs are also good managers, but others are not.

Since founding Twitter in 2006, Dorsey has had a reputation for not having a keen interest in day-to-day business.

He therefore lost the top post in 2008, only to return to the top in 2015 when Twitter was in dire financial straits.

At the same time, he ran the payment processor Square, which he founded in 2010.

Uninvolved people may admire this dual role, but it was an imposition for shareholders.

Facebook's value has more than quadrupled since 2015, while Twitter was still posting losses recently.

No wonder that the investment firm Elliott Dorsey wanted to push out of office last year.

Another factor that played a role in Dorsey's withdrawal is the fact that social media has lost much of its sex appeal.

Instead of spurring a democratic culture of debate, they apparently promote the polarization of societies.

Laws are being planned everywhere that will restrict the freedom of disposition for companies like Twitter.

That spoils the joy of work for some company leaders.

Dorsey is now dedicated to the Square company.

It is unclear whether their shareholders can now look forward to it.