Well, you guys heard ciccio, mains voltage and glass objects are dangerous!
We better get rid of wall outlets, since the HOT parts are accessible to users... We should also do away with glass cups and bottles as we could cut ourselves!
In fact, personal Faraday cages and sippy cups should be mandatory for everyone to prevent electrocution or severe gashes!
Hope you are joking.. Glass cups are not electronic devices. There is NOT a safety regulation for them...
Wall outlets in any country (outside US and the other who use US type sockets) do not have user accessible parts.
If you want to have accessible LIVE part in your house, that's you choice, but no manufacture should be allowed to sell them to you.
HOT for me refers to temperature, not mains voltage (in fact the max voltage inside that amp is 12 V dc). Tubes are hot, a child can burn his hands by simply touching it, and the blue LED is an attraction.
Serious manufacturers of tube equipment install a perforated shield over the tubes, such as the one in the attachment (randomly chosen on the NET).
If the customer removes it to have his evening orgasm whilst looking at red tubes, it is his choice, but the manufactures demonstrates his competence in installing it by default.
Other (don't want to say less serious) do not install any protection and maybe don't even have the money for buying a copy of the relevant safety specification.
When a problem arise, you will discover that the did not have the money for product's liability assurance too.