Why is managing clients still so complicated for small professional practices?

I’ve been exploring a simple idea for small professional practices — doctors, lawyers, CAs, consultants, etc.

Most of them don’t need a giant enterprise CRM.

They need something that helps them manage:
• Clients
• Appointments
• Documents
• Follow-ups
• Payments
• Communication
• Records

And ideally, it shouldn’t require a week of training to understand.

I’m experimenting with a lightweight client-management concept around this.

For people running small practices: what’s the one piece of admin work you hate doing?