You clearly misunderstand how patents work- Langstroth's patents expired over 100 years ago. Anyone is free to make them now. I think it is about 25 years until the Flow patents expire: and after that time- you or anyone else is free to make them.
I wonder if your view on this issue might change if you spent years and years of your own time and invented something worth millions... the patent system encourages innovation because it protects peoples Intellectual property. Without it your invetnion may as well be mine- if I am in a better position than you to exploit your idea and your hard work.
And here you are - on the Flow forum- getting free advice and help from Flow users- all paid for and hosted by the Flow company- encouraging people to rip off Flow's intellectual property? This website hasn't appeared out of thin air- and it costs actual money to maintain it. If people took your advice- and put their hip-pocket ahead of the law- they would be undermining Australian manufacturing and Australian jobs- sending money overseas to buy counterfeit items made in China (or wherever).
Do you trust the counterfeiters when they say they use BPA plastic? They are breaking the law in their own country- ripping off other peoples hard work- are they trustworthy? Have they field tested their product? Are they honorable people?
Do you think it would be OK- if counterfeiters made copies of every patented product so you could save some money? Do you think in the long term consumers and innovation would benefit from such a free for all approach?
How could any Australian manufacturer compete with overseas counterfeiters?
Flow employs 40 people directly and manufacturers in Australia- those wages and jobs depend upon the protection a Patent offers. If you illegally buy and import counterfeit product from overseas- you are undermining Australian innovation, jobs and manufacturing. Your money is also going offshore.
A counterfeiter does not need any product safety verification, any R & D department, any advertising people, any IP specialists, or any patents: they only need to copy the hard work of other people and manufacture it in a low regulation and low wages economy. If there was no IP protection they would have a huge advantage over the actual inventor. Is that fair?
Without the Patent system any inventor who does not have a lot of capital would find themselves at the mercy of larger organizations. Any small country would have no hope of competing with larger countries or even corporations. If you invented something- but didn't have the money to manufacture it - any company could steal your idea and make huge profits from it leaving you with absolutely nothing. What would be the incentive for you to invent anything at all?