Totally wrong. You misunderstood it. People can not allow or disallow bitcoin and bitcoin transactions. Miners do it because bitcoin is operated by Proof-of-work and transaction will be confirmed by miners, not a person.

Bitcoin block time is about 10 minutes for one block. Sometimes it can be longer or shorter than 10 minutes but in median, block time is 10 minutes. When you make one transaction, the waiting time to see it gets first confirmation will depends on the fee rate you set up for your transaction and the mempool status. If the mempool is clear, with the same rate, you can get faster transaction than when mempool is loaded a lot. Check mempool status and see my guide for more explanation

Second-layer solution as Lightning Network can bring much faster transactions but development pace and adoption are still limited.

As said above, the speed of confirmation depends on the fee rate you use. If the mempool is stucked and you use fee rate at 1 satoshi/(v)byte, your transaction can be stucked for days or even 2 weeks before difficulty on the network was readjusted and mempool status becomes better.

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Reasons to use bitcoin, IMO:

• Be your own bank.
• No one can freeze your bitcoin
• A fixed total supply, deflation over time (after each 4-year halving, block rewards will be halvened)
• Decentralization

Note that you need to use non-custodial wallets (Bitcoin Core, Electrum) to be your own bank.