Fascinating: walks back an old, famous post of his, about being a 'T-shaped' marketer, and argues that being a 'generalist' nearly never gives you good career outcomes.
Sometimes, generalist just means dabbler. And dabblers don't go anywhere.
Conversation
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Being a great product manager or even the role of a CEO is slightly aligned to being a 'Generalist'. Because integrating and making the teams understand the importance of each other is really much valuable.
It may be just the 'contextual difference'
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Brian is talking specifically about the marketing context. There, the difficulty is getting good at one channel, at one playbook, early in ones career.

