The Actual Problem
The problem is not the 'Things' nor the 'Internet' but is the way that the big corporations want to control how the things are accessed, and ultimately how you will pay them for this.
There are many things that are useful to do remotely (over the internet) back into your home, or other sites. For example: remote monitoring of cctv and alarms, setting the house to look occupied (turning lights, music on/off, closing/opening curtains). These may prevent burglaries while you are away. As already mentioned: setting heating.
It may also be useful to receive notification when your doorbell is rung and you are away, and be able to communicate with them using your phone*.
The real problem is that the corporations want to route all this traffic through their own cloud networks so that can can monetise this, either by subscriptions, by direct charging for traffic, by adding ads, or by selling data, or all of the above.
What I would do is to have my own gateway computer that provides a firewall to only allow certain remote devices to access the internal network of things, eliminating the need for anyone else to be involved. This would require having your own fixed IP address - probably requiring IP6. Having the 'things' directly accessing the internet, or being directly accessed from externally is foolish and unnecessary.
* I should patent the idea of having a speaker phone built into the doorbell that will auto-answer a call from the owner's phone. The doorbell could ring you or send an SMS message.