Its not at all.
I do agree in recent months with the very odd situation of lock down + sun + wind Agile has had alot of plunge pricing, but you need to look at the overall energy use for year + the benefits/losses of going to a smart meter.
Our electricity usage was massive in November/December last year, and looking at Octopus Agile rate from than even excluding the 4-7pm 'peak', the overall average cost of electricity was the same/higher than the 8p per kWh am paying with E7, which I used to charge the PW overnight to full to avoid any day time electricity usage.
When it comes to this summer I've been amazed at how little grid electricity we have used overall thanks to the PW+solar, May was under 1kWh a day, even this month with all the rain its going to be barely 2kWh a day average. That translates to a stupidly low electricity bill, yes Agile I think would have been cheaper, but saving 50% on £3 worth of electricity is hardly anything to get excited about.
The final point is about if I want a smart meter installed, am still undecided, I like E7, its predictable, easy to plan around, and if I get a smart meter I loss the choice of been on E7. We all known how electricity companies can change their tariffs with little warning, what if I switch to Agile and Octopus whacks up prices?? I'll than be stuck not been able to move back to E7 and having to pay what ever the going rate is.